Most of you know how to do this, but I couldn't find a proper tutorial so I thought I'd take a stab. It's very simple and fun. Although the benefits of binaural beats range from the fantastic to total quackery / pseudoscience, they still set the transparent pulse for some of the most relaxing meditation tapes ever made.. and if used sneakily enough in your own work, maybe you could inflict some feelings of paranoia or totally blissful relaxation upon your listeners. It's like playing jesus.

What you need:
-A pair of headphones (don't use speakers for this)
-Subtractive softsynth with at least 2 oscillators (Serum demo works great if you freeze the track)
-GTune / C_Tuner (both are freeware, both work for this)

The real magic happens when you play with the finetuning of one of the oscillators. You should be able to hear some effect immediately with even a small difference of 9 cents while playing a C3 (put your headphones on for this part). If your brain starts to oscillate, you're doing it right. I wouldn't suggest modulating any of this with an LFO unless you really want to kill people, but playing with the parameter in your DAW for a desired effect over a long period of time can be really cool or possibly therapeutic, according to some weirdos.

The idea with binaural beats is that the difference between these two frequencies is what your brain perceives and begins resonating in sync with. If you separate them too much, your brain will eventually figure out where sounds are coming from more specifically and your binaural beat will go bye bye. Keeping your frequencies in check (about 30 - 40 Hz, depending on which interweb you ask) is supposedly ideal. To make things even more hypnotic, modulated noises or miked sounds can create a really nice bed for your binaural beats. As long as the beat is audible in the mix, it's just as effective, so you can really go nuts and whisper all sorts of subliminal messages to your listeners.

Cheers mate, gonna give this a squizz when I get back home. I once had a listen to some of those Binaural beats when i was younger cause the message said I could get high. It didn't work, but the sounds were relaxing as it is.

i fucking love fucking with binaural beats
i have an occultist ambient sideproject going on and i experiment the hell out of them
one time i made a variable binaural beat (actually two of them) that abruptly gated between mu and theta with the a slow (really stretched out riff) binaural synth line whose frequencies slowly traded places with a light phaser going off in it (that i think, if i can recall correctly, was also a theta wave)